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Subaru Telescope

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Subaru Instruments, Science, & FutureMasanori Iye (National Astron. Obs.)1990(Site for Subaru),1995(GTC review),1997(Obs WHT), 20091)Subaru Intrument Suite- Parameter space coverage, - Operational Aids2)Science Achievements- Probing the cosmic dawn – - Study on GRB – Hypernovae connection3)LGSAO and Wide field instruments- Subaru’s future in the ELT era


Subaru Telescope

History

・Design Study : 1984-1990

・Construction : 1991-1999

・Engineering FL : Jan.1999

・Open operation : Dec.2000-

Cost

・~300MEuro for construction, ~20MEuro/yr

Science (last five years)

・proposal award rate 1/3 => 80 refereed papers/yr


Subaru Telescope image size statistics

1 arcsec = 5 μrad

λ/D=0.06 arcsec (@λ=2μ)

=0.015arcsec(@λ=0.5μ)

Miyashita et al.

Best image ~0”2(K、R)Median seeing ~ 0”6 (R)

FWHM size distribution

すばる         岡山

0.“65 Median

Okayama 2.“2

Kiso 2.”7

Best image w/o AO


Instrument Phase Space (2009)

Wavelength resolution

Wavelength


Operational Aids

  • 8 instruments at 4 foci,

  • 5(7) top units : 4 M2s, Suprime-Cam, (LGSLT, FMOS)

  • Semi-robotic Exchangers

Many massive components

to exchange!

Suprime-Cam, (FMOS)

M2 (Opt-Cs, Opt-Ns,

IR-Ns, IR tip-tilt)

HDS

AO188, IRCS,

(HiCIAO)

FOCAS, MIRCS,

CIAO, COMICS


Cassegrain Instrment Exchanger


Top Unit Exchanger Systemshow Exchange_topunit_256.wmv


2. Science Achievements

  • 1) High redshift galaxies

    Narrow-band imaging to survey for

    Lyman Alpha Emitters

  • 2) Hypernova – GRB connection

    Spectrophotometry of core-collapse

    SNe


World record of the most distant galaxies

redshift

8m telescope

CCD

Redshift

4m telescopes

IOK-1 (Iye et al. Nature 2006)


The most distant galaxy 12.8 Gyr ago (z=6.964).

Iye et al. 2006, Nature, 443, 186

1 / 41,533


Guinness record (for 1052 days)*New record will arrive at 95% confidence level at earliest in 27 days and at latest in 112 years.

@July 25, 2009


Cosmic Dawn

Beginning of reionization

LAEs are decreasing in number from z=5.7, z=6.6, to z=7.0 => Due to intergalactic absorption fo Lyman α photons by neutral hydrogen.

End of re-inoization


SN 2003dh/

GRB 030329

SN 2002ap

Connection of GRB and Hypernovae

Polarimetric Spectroscopy

Kawabata, Mazzali,….

  • SN 2002ap

    • No GRB

    • Hypernova

    • Polarized SED shows high velocity

GRB

  • SN 2003dh/GRB 030329

    • Jet along the l-o-s.

    • Hypernova epoch back-dating coincided with GRB event

    • No polarization

Jet visible only from its direction

jet

Asymmetric

Explosion

Polarized

Scattered Light

Jet


Adaptive Optics and Subaru’s future


188 element AO: first NGSAO image

6M$ LGSAO improved the image quality of 400M$ telescope by 10 times.

θ1 Ori C

Orion Trapezium IR image

Without AO (1999)

With 188 NGSAO (2006)


Subaru LGSAO system


Sum-frequency laser

13.5W(1064)+5.0W(1319)=>PPMgO:SLT=> 6.4W(NaD2)


LGSAO 2nd light movie

  • LGSAO-video : replay from 08:20


Wide Field Instruments


Hyper Suprime Cam (HSC) : 1.5d FOV


FMOS : 400 fibers in NIR


WFMOS: 4000 fibers, optical

ASPEN intiative

Wide field multi 103.5 fiber spectrograph for cosmology and Galactic archeology.

(BAO, Dark energy,..)

Gemini borad cancellation

of WFMOS funding

NAOJ fund raising effort

for HFMOS …


Subaru Synergy with TMT

・TMT chose MK.

・Subaru is prepared

to strengthen its

wide field survey

capability with

HSC (+HFMOS?)

for the ELT era.

・Time sharing among

8m class telescopes

to be arranged.


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